Temperature-regulating device.



W. W. CURTIS. TEMPERATURE REGULATING DEVICE.-

APPLIoATIoN FILED FEB. s, 190e.

912,293. Patented Feb. 16, 1909.*

V from unirsi) STATES Arnnroiririon.

WALTER W. CURTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL REGULATOR COM-v PANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

TEmERATURaREeULATING DEVICE.

Specication of Letters Patent.

Patentefi'reu 1c, 1909.

Application inea February 3, 190s. seriai No. 414,046.

cago, in the county of Cook and State of Illi-' nois, have invented new anduseful Improvements in Tem erature-Regulating Devices, of which the fo lowing is a full, clear, concise, and exact description, reference being had to the accom anying drawing, forming a part of this speci cation.

My invention relates to improvements in thermostatic devices for controlling the low of a fluid such as air under pressure, to or a motor actuated thereby and arranged to operate valves, dampers and the like in the regulation of heating apparatus. In some cases, as for instance where the motor controls the `flow of steam to a radiator, it is desirable that the motor may be made to act positively, that is, so that the steam shall be turned off or on completely before the motor stops or begins to move in the opposite direction. It be admitted quickly to the radiator, and in spine cases it should be turned off quickly a so.

The object of the resent Ainvention is to iich is controlled byl provide a device w changes in temperature conditions and which admits a large volumeof air under pressure to the motor to operate it quickly and fully in onel direction land which, u on a temperature change of the op osite 'nd, will shut oi the iiowof fluid to t iemotor and quickly and positively open a large exhaust port to permit the iiuid stored discharged to the atmosphere.

In the accompanying drawings, iii-which I have illustrated an embodiment of my invention, Figure 1 shows a vertical longitudinal section of m improved thermostat, this section being ta en on the line 1 1 of Fig.

3, looking in the direction 'of the arrows; Fig. l

2 is a vertical sectional view taken on a plane atk right angles With the plane of Fig. 1; Fig. 3 is a cross sectional view of Athe de vice, the section being taken on the line 3 3 of Fig. 1, looking 4in the direction indicated by the arrows; Fig. 4 is a plan view of one of the parts of the device dis'associated from the other parts; and Fig. 5 illustrates a y steam radiator,fa. thermostat, a source 01' l the upper side ofthe diaphragm. A byfpass fluid under pressure, a fluid-operatedl motor l is also important that the steam in the motor to be for controlling the valve leading to the steam radiatoi'dand a system of piping connecting the thermostat with the source of luid sup- 'ply and the motor.

In these drawings 10'is a tube of hard rubber or other material adapted to expand and contract under changes in temperature conditions. A plug 11 screws into the upper end of the thermostatic tube 10 and a second same, this plu forming, with the block 13 (shown by itse f in plan in Fig. 4) the base of the device and having passages leading therethrough for the admission of fluid to the chamberA within the tube 10 and therefrom. 4The block 13 is secured to the plug 12 b means of screws 13a passing th'erethroug into the plug. The passage 14. communicates, by means of a pipe 15, with a tank 16 containing compressed air or the like. In thechamber within the tube 10 is arranged a standard 17 provided at its upper end with a stan ard 17 and at its opposite end to a block 19. A second flat spring 20 connects the opposite end of the block 19 with a valve piece 21. A thrust-rod-22 bears upon the upper side of the block 19 and extends upwardly to an adjusting screw 23 through the plug .11. When the t ermostatic tube 10 is contracted by the lowering of the tem erature of the room this rod 22 will thrust tlie block 19 downward, swinging lthe valve iece 21 into en agement with its seat 24. rom this oint Ieads a passage 25 to a chamber 26 in t e base of the device. This chamber has va .diaphragm 33 vextending I thereacross. Leading from this chamber i' 26, above the diaphragm is a restricted pasg sage 27 leading being provided l the restriction.

for regulating the extent of Leading from that part of 33 are two passages, one of which. designated 29, leads to the atmos here and the other of f which, designated 30,1lleads to the motor 31 t through a pi e 32. -The passa e29 termi nates in a va ve seat 29a covere V by the diaphragm 33, the centerl of which'constitutes a valve for theport, closin l state of pressure exists in t e chamber-26 on 34 provided which leads around the champlug 12 screws into the Vlower end of the assing the chamber which is below the ('ia'phrr-.gmh

said port when a flat s ring 18 secured. at one of its ends to the to the atmosphere, a screw 28 and thence to the motor.

ber 26 from the passage25 to the passage 30 ln this by-pass is located a check valve 35 pressed toward its seat by a spring 36'. The motor 31 is provided with an air chamber 37 and a diaphragm 38. The diaphragm 38 is mechanically connected with a valve 39 and is pressed upwardl by a spring 40 which tends to move the va ve away from its seat and ermit steam to ilow to the radiator 41. en air is allowed to ilow through the pi e 32 to the air chamber 37 of the motorftlle diaphragm 38 is flexed and the valve 39 is moved to its seat against the tendency ofthe spring 40 to 4move 1t away from the same.

The operation of the system is as follows;

4 The chamber Within the thermostatic tube the motor 31,

vthermostatic element 10 to contract.

vair to the motor.

closes to prevent air from the motor ilowingY 10 is in communication with the air supply tank 16 vthrough the pipe 15 and passage 14. With the parts in the positions shown in Fig. 1, air under pressure passes fromthe chamber within the thermostatic tube through the assage 25 to the chamber 26 in the base, hdlding down the diaphragm 33 upon the exhaust port 29. When surlicient pressure has been attained in the chambers of the device the check valve 35 is unseated thereby and air flows through the pipe 32 to :flexing the diaphragm ofthe motor and closing the steam valve, thereby shutting off the steam from the radiator. The room thereupon begins to cool and rltllie is contraction Jfinally seats the valve 21, closing the passage 25 and shutting od the flow of The check valve 35 now around to the chamber 26. The pressure in the chamber 26, which has heretofore held down the diaphragm 33 upon the exhaust ort 29, is now relieved. through the relief port 27, allowing the back'pressure from the motor to raise the diaphragm 33, and thus permitting the air. to flow back from the motor through the pi e 32, passage 30 and exhaust port 29 to t e atmosphere. The motor is thus permitted to dischar e the air from its chamber rapidl and t e steam valve is quickly opened y the spring 40. Steam' is now admitted to the temperature of the room begins to rise. This rise in temperature causes the thermostatic tube to lengthen, relievin the pressure of the thrust-rod 20 on the va ve 21. This valve is, however, held to its seat for a time until the thermostatic tube 10 has so far expanded that the block 19, under the inluence of' the sprin 18,*has risen suciently to store'considerab e energy in the sprin 20, 'whereuponthe air pressure tending to old the valve against its seat is overcome and the valve suddenly opens. Air flows' down the passage 25 and encounters the check the radlator and chamber 26, holding the diaphragm 33 down over the exhaust port 29 and shutting oil Jthe exhaust. Pressure now rapidly increases in the chamber 26 and passage 34, and when sulicient pressure hasv been attained the check valve 35 is forced open and air finds its way through the pipe 32 to the motor, moving the steam valve to closed position against the tendency of the spring 40 to hold the same open. This action ta es place quickly as the valve 21 is wide open and permits the air to flow rapidly through the pipe 32 into the air chamber of the motor and speedily fill the same. The check valve 35 does not toward the motor to appreciably retard the action of the motor 1n closing the steam valve 39..

What I claim as new and desire to secure by Letters Patent is:

1. Thecombination with a motor operated by luid pressure, of means for controlling said motor comprising a chamber communicating with a source of supply of fluid under pressure, a passage chamber to said motor, a thermostatically controlled valve for closingsaid passage, a 'secondary chamber' communicating with said passage, a relief port for said secondary chamber, an exhaust from said motor, and a valve located inl said Ysecondary chamber and subjected to lthe pressure therein for closing said exhaust. 'y

2. The combination gwith a motor 0per-. ated by fluid pressure, of means for controlling said motor comprising a chamber communicating with a source oi supply oi lluid under pressure, a passage leading from said chamber to said motor, a thermostatically controlled valve for closing said passage, a .secondary chamber1 communicatin with said first-named chamber when sai is opened, a reliefport for said secondary chamber, an exhaust from said motor, a valve in said secondary chamber for controlling said exhaust, lsaid exhaust-controlling valve bein arran ed to be seated by the pressurewit in sai secondary chamber when said thermostatically controlled valve is opened.

3. The combination with a motor operated byy iluid' pressure, of means for controlling said motor comprising a chamber com- .municating with a source of supply of iiuid under pressure, a passage leading from said chamber to said motor, a valve permitting the flow of fluid through said passage in one direction only, a thermostatically controlled valve for closing said passa e,-a secondary chamber communicating wit said passage, a relief port lor said secondary chamber, an exhaust from said motor,'and a valve in said haust, said valve being subjecte tc presofier sufficient resistance to the flow of air valve' leading from saidl secondary chamber for controllin said exvalve 35, which is closed, and fills thel sure from said first-named chamber When said thermostatically controlled valve is opened and beingseated by such pressure.

4. The combination with a motor operated by fluid pressure, of means for controlling said motoi' comprising a chamber communieating with a so Jrce of supply of fluid under pressure, a passage leading from said chamber to said motor, a valve arranged to close said passage and tending to unseat itself against the pressure in said chamber, thermostatically responsive means for closing said valve, 'a secondary chamber communicating with said passage, a relief port for said secondary chamber, an exhaust for said motor, and a valve in said secondary chamber for closing said exhaust, said valve being seated by pressure in said secondary chamber and o ening when said thermostatically controlled valve is closed.

5. The combination with a motor operated` by fluid pressure, of means for controlling said motor comprising a chamber communicating with a source of supply of r fluid under pressure, a passage leading from said chamber to said motor, a valve for closing said passage, said valve being subjected to the 'pressure within said Achamber and opening against such pressureL thermostatically responsive means for controlling said valve, an exhaust from said motor,

. a valve for ,controlling said exhaust, said valve being held to its seat by pressure from said chamber when said, first-named valve is opened, and a relief port for releasing the pressure behind said pressure-operated valve.

6. The combination With a motor o erated by fluid pressure, means for control ing said motor comprising a chamber communicating with a source of supply Aof' fluid under pressure, a passage leading from said chamber-to said motor, a tliermostatically controlled valve. forclosing said passage,

said valve being'arranged to open against the pressure Within saidy chamber, a check valve in said passage, a second valve subjected to pressure from said chamber when said thcrmostatically controlled valve is opened, a relief port for releasing the pressure upon said second valve when said thermostatically controlled valve is closed and anexhaust from said motor controlled by said last-namedvalve.

7. The' combination with a motor operated by fluid pressure, of means for controlling said motor comprising a chamber communicating With a source of supplyof vfluid under pressure, a passage leading from said4 chamber tothe motor, a thermostatically controlled valve for closing 'said passage, said valve opening against thev pressure within said chamber, a check valve in said passage, `a secondary chamber communieating with said-passage', a relief portfor Said secondary chamber, an4 exhaust from vthe motor, a diaphragm in said secondary supply of fluid under pressure, a passage leading from said chamber to said motor, a

thermostatically controlled valve in said chamber for 4closing said passage, 'a secondary chamber communicating With said passage, a relief port for said secondary chamber, an exhaust for said motor, and a valve located in said secondary chamber and subjected to the pressure therein for closing said exhaust.

9. The combination with a motor operated by fluid pressure, of means for controlling said motor comprising a thermostat having a chamber communicating with a source of sup ly of fluid under lea ing'from said cham er to said motor, a thermostatically controlled valve in said chamber for closing said passage, a secondary chamber communicating With said passage, a relief port for said secondary chainber, an exhaust from said motor, and a valve located in said secondary chamber and subjected to the pressure the rein, for closing said exhaust when said thermostatically controlled valve is open.

10. The combination with a motor. operated by fluid pressure, of means for controlling said motor comprising a hollow thermostat communicating with' a source of supply of fluid under pressure, a passage leading from said chamber to said motor, a valv'e in said thermostat for closing said passage, said valve being operated by expansion and contraction of said thermostat, a secondary chamber communicatinu with said hollow thermostat when said valve is open, and having a relief port, an exhaust from said motor, and a valve in said secondary chamber for controllin Vsaid exhaust., said exhaust-controlling va ve being arran ed to be held to its scat by the pressure Wit in said-secondary chamber when said first named valve is opened.

11. The combination with a motor operated by fluid pressure, of a hollow thermostat communicatingwith a source of supply of fluid under pressure, a passage leading from said chamber to said motor, a valve arressure, a passage y rangedl to permit the flow of fluid through said passage in one direction only, a valve closin said passage, said valve being controlle vby expansion and contraction of said thermostat, a secondary chamber communi- -cating with said passage'and having a reated by iiuid pressure, of ahollow thermo-A stat communicating with a source oi supply of luid under pressure, a passage leading from said thermostat to said motor, a valve arranged to control said passage and tending to unseat itself against the pressure in said chamber, said valve being moved by expansion and contraction of said thermostat, a secondary chamber communicating with said. passage and having a restrictedrelierl port, an exhaust for said motor,v and a valve in said secondary chamber for closing said exhaust, said valve being seated by pressure in said secondary chamber when said iirst- .named-,valve is open and opening when said thermostatically controlled valve is closed.

13. The combination with a motor operated by lluid pressure, of a hollow thermo-- stat communicating with a source of supply of fluid under pressure, a passage leading irom said thermostat to said motor, a valve within said thermostat operated by expansion and contraction oi said thermostat Jfor controlling said passage, said valve being subjected to the-pressure within said thermostat and opening against such pressure, an exhaust from said motor, a lvalve for controlling said exhaust and arranged to be held to its seat by pressure from the chamber Within said thermostat when said firstnamed valve is opened and a relierp port for releasing the pressure behind said pressure operated valve.

14. The combination With a motor operated by Huid pressure, of a thermostat having a chamber therein communicating with a source.A of supply of fluid under pressure, a

passage leading from said chanibei'to said motor, a valve for closing said passageoperatedby expansion and contraction of vsaid thermostat, said valve being arranged to open against the pressure within said chame ber, a check valve in said passage, an exhaust-controlling valve operated by pressure from said chamber Whensaid first-named .valve is opened, and a relief port for releasing the pressure upon said exhaust-controlling valve when closed.

15. The combination with a motor operated by iiuid pressure, of a thermostat having Vsaid first-named valve is a chamber therein communicating with a inotor, a thermostatically controlled valvel source of supply of fluid under pressure, a passage leading from said chamber to the iorvclosing said passage, said valve opening against the pressure Within said chamber, a l stricted vent, a thermostatically controlled check valvey in said assage, a secondary chamber communicating with said assage between said check valve and said t ermostatically controlled valve, said secondary chamber having a restricted relief port, and a diaphragm in said secondary chamber constitutmg a valve for closing the exhaust from said motor when subjected to pressure by the opening of said thermostatically controlled valve.

16. The combination Witlia motor, of a source of supply of iluid under pressure for operating said motor, and an apparatus arranged to establish communication between said source of supply and said motor and thereafter to close said communication and open said motor to the atmosphere, said apparatus having a passage'leading from said source of supply to said motor, a check valve in said passage, a chamber having a restricted vent, a passage leading from said statically controlled valve for controlling the flow of' liquidthrough both of said passages, an exhaust passage leading from said motor to the atmosphere, and means within said chamber for controlling said exhaust passage, said means being subjected to pressure when said thermostatically controlled valve is open and thereby operating to close said exhaust passage and arranged to open said exhaust passage when said thermostatically controlled valve is closed.

17. The combination with a motor, of a source of supply of uid under pressure for operating said motor, and an apparatus arranged to establishrcommunication between said source of supply and said motor and `thereafter to close said communication and open said motor to the atmosphere, said apparatus having a passage leading from said source of supply to said motor, a check valve in said passage, a chamber having a restricted vent, a thermostatically controlled valve for controlling the flow of uid to said passage and to said chamber, an exhaust phcre, and a diaphragm in said chamber arranged to close said exhaust port when said thermostatically controlled valve is open and permitting said exhaust port vto be opened when said thermostatically controlled valve is closed.

18. The combination with a motor, of a source of supply of fluid under pressure for Yoperating said motor, and an apparatus arranged to establish communication between said source of supply and said motor and thereafter to close said communication and open said motor to the atmosphere, said apparatus having a passage leading from said source of supply to said motor, a check valve in said passage, a chamber having a report leading from said motor to the atmosvalve for controlling the flow of fluid to said by to permit said motor to exhaust the atpassage and to said chamber, an exhaust mosphere. port leading from said motor to the atmos- In Witness whereof, I have hereunto subphere, and means Within 'said chamber ar'- scribed my name in the presence of two Wit- 5 ranged to be subjected to pressure on one l nesses.

side When said thermostatically controlled WALTER W CURTIS valve is open and thereby caused to close said exhaust port and to be subjected to VVitne'sses: pressure from said motor when said thermo- M. L. FARRAR, 10 statically controlled valveis closed andtherel C. L. HOPKINS. 

